Home / 2,213.75-3,320.69-1,239.09

Finding the Fourth Proportional to 2,213.75, 3,320.69 and 1,239.09

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Solution

The fourth proportional to 2,213.75, 3,320.69 and 1,239.09 is: 1,858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.75 : 3,320.69 = 1,239.09 : x
  2. Step 2: Convert to fraction form
    2,213.75/3,320.69 = 1,239.09/x
  3. Step 3: Cross multiply
    2,213.75x = 3,320.69 × 1,239.09
  4. Step 4: Simplify right side
    2,213.75x = 4,114,627.58
  5. Step 5: Solve for x
    x = 4,114,627.58/2,213.75
  6. Step 6: Final answer
    x = 1,858.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.